I need help finding the value of X. but once found the answer needs to be rounded to 1 decimal place.

Every rhombus is a square. true false

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )